package com.lbc.state;

//  测试线程的优先级  //  大部分情况下，是优先级高的先跑
public class TestPriority {

    public static void main(String[] args) {
        //  主线程默认优先级
        System.out.println(Thread.currentThread().getName()+"-->"+Thread.currentThread().getPriority());

        MyPriority myPriority = new MyPriority();

        Thread t1 = new Thread(myPriority);
        Thread t2 = new Thread(myPriority);
        Thread t3 = new Thread(myPriority);
        Thread t4 = new Thread(myPriority);
        Thread t5 = new Thread(myPriority);
        Thread t6 = new Thread(myPriority);

        //  先设置优先级，再启动
        t1.start();

        t2.setPriority(1);
        t2.start();

        t3.setPriority(4);
        t3.start();

        t4.setPriority(Thread.MAX_PRIORITY);  //  MAX_PRIORITY = 10
        t4.start();

//        t5.setPriority(-1);
//        t5.start();
//
//        t6.setPriority(11);
//        t6.start();
    }

    //  有可能会有一个小问题，性能倒置
}

class MyPriority implements Runnable {

    @Override
    public void run() {
        System.out.println(Thread.currentThread().getName()+"-->"+Thread.currentThread().getPriority());
    }

}
